Variations of the vertical cutoff rigidities for the world wide neutron monitor network during 1950-2020.
Abstract
Vertical cutoff rigidities for the world wide neutron monitor network are obtained with one year resolution during the period of 1950-2020 by the method of trajectory calculations. The models of Definitive Geomagnetic Reference Field and International Geomagnetic Reference Field have been used. Besides, cutoff rigidities for the whole period were obtained using model by Tsyganenko Ts89 with involving yearly mean values of Kp index. In each case an estimation of penumbra contribution was made in approximation of flat and low spectra (index in variations spectrum 0 and -1) of cosmic ray variations. The results testify total decrease of cut off rigidities practically in the all locations, which is apparently connected to the common decrease of magnetic field in a considered period.
- Publication:
-
41st COSPAR Scientific Assembly
- Pub Date:
- July 2016
- Bibcode:
- 2016cosp...41E1142L